Very simple to install. The packaging didn't include labels for the wires like the 9585 model but I just took a picture of the wire connections before removing the old model and all went well. Highly recommended.
The wifi 9000 is a very nice color thermostat that functions in an intuitive manner. It's easy to understand, and setup as well. It provides the outside temperature and humidity as well as the inside. It can be programmed for daily hour by hour use both locally and remotely from a smartphone or computer via browser.
This is a great purchase and being able to control this from your phone is amazing. You can make adjustments to the temperature when you are on the way back from vacation or even set up a schedule. We love it!
The 9000 is a well thought out design and it functions as it should. I replaced a Nest third generation thermostat that was not working properly. The app is good. The only thing I miss is the history the Nest provided. History shows how long the heating or cooling appliance operates and it also toggles to the exact time of day it was on. This helps set a schedule and to also identify a problem